WO2013056607A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2013056607A1
WO2013056607A1 PCT/CN2012/081362 CN2012081362W WO2013056607A1 WO 2013056607 A1 WO2013056607 A1 WO 2013056607A1 CN 2012081362 W CN2012081362 W CN 2012081362W WO 2013056607 A1 WO2013056607 A1 WO 2013056607A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
layer
surface alignment
alignment layer
crystal display
Prior art date
Application number
PCT/CN2012/081362
Other languages
English (en)
Chinese (zh)
Inventor
崔贤植
李会
徐智强
田正牧
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US13/698,473 priority Critical patent/US9146421B2/en
Priority to JP2014536097A priority patent/JP6037476B2/ja
Priority to KR1020127030808A priority patent/KR101566066B1/ko
Priority to EP12778027.8A priority patent/EP2605061A4/fr
Publication of WO2013056607A1 publication Critical patent/WO2013056607A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133565—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133633—Birefringent elements, e.g. for optical compensation using mesogenic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133723—Polyimide, polyamide-imide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133738—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homogeneous alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Definitions

  • Embodiments of the invention relate to a liquid crystal display. Background technique
  • the observed image has a color shift.
  • the alignment film is subjected to a rubbing process during the preparation of the liquid crystal display, it is generally rubbed in a direction opposite to the gate electrode peripheral contact point (Gate-Pad) (for example, from left to right). Therefore, after the liquid crystal is added to the formed liquid crystal cell, the liquid crystal has a pre-tilt angle in the opposite direction (right) of the Gate-Pad. Therefore, as shown in Fig.
  • the viewing effect when viewed from the right side of the liquid crystal screen, the phase difference of the liquid crystal is relatively large, and the viewing effect may be yellowish; when viewed from the left side of the liquid crystal screen, the phase difference of the liquid crystal is relatively small. , the viewing effect will be blue (Bluish).
  • a polarizer and a color shift compensation film are commonly used to improve the color shift phenomenon when the liquid crystal screen is viewed from the left and right sides.
  • the polarizer is added with a c-plate to compensate for the color shift in the up, down, left, and right directions, and the luminance value of the low gray level.
  • this technical solution not only increases the cost but also increases the thickness of the polarizer.
  • the scheme can compensate for the color shift in all directions, the optical design process is very complicated and is not conducive to the problem of large-scale application. Summary of the invention
  • the technical problem to be solved by the embodiments of the present invention relates to how to eliminate the color shift problem of the liquid crystal display in the fringe field switching mode, and to control the production cost and simplify the design.
  • One embodiment of the present invention provides a liquid crystal display comprising: a color filter substrate, an array substrate, and a liquid crystal layer between the color filter substrate and the array substrate.
  • An upper surface alignment layer is disposed between the color filter substrate and the liquid crystal layer, and a lower surface alignment layer is disposed between the array substrate and the liquid crystal layer.
  • the upper surface alignment layer sequentially includes a first upper surface alignment layer, a color shift compensation film layer, and a second upper surface alignment layer in a direction from the color filter substrate to the liquid crystal layer.
  • Color shift compensation The orientation direction of the film layer is opposite to the pre-orientation direction of the liquid crystal layer.
  • the color shift; the material of the film layer is selected as a reactive monomer material.
  • the rubbing direction of the first upper surface alignment layer is set to be the same as the rubbing direction of the lower surface alignment layer.
  • the rubbing direction of the color shift compensation film layer is set to be the same as the rubbing direction of the lower surface alignment layer.
  • the rubbing direction of the second upper surface alignment layer is set to be opposite to the rubbing direction of the lower surface alignment layer.
  • FIG. 1 is a schematic diagram of a color shift problem of a liquid crystal display in the prior art, wherein a phase difference when the liquid crystal is viewed from the right side is greater than a phase difference when the liquid crystal is viewed from the left side;
  • FIGS. 2A-2B are schematic structural views of a liquid crystal display provided by a specific embodiment. detailed description
  • the phase difference is reduced by using the color shift compensation film in the embodiment of the present invention.
  • the reactive monomer material (Reactive Mezogen, RM) was selected for the material of the color shift compensation film.
  • This RM material is also known as reactive liquid crystal.
  • the reactive liquid crystal has a liquid crystal core with one or more reactive groups (Reactive Groups), usually an Acrylate Group, which can be photopolymerized into a polymer network. Since most of the polymerization initiators used are UV-sensitive (wavelengths of 254 to 365 nm), reactive liquid crystals are also referred to as UV-reactive liquid crystals.
  • suppliers and products of UV-reactive liquid crystals include Merck's RM series, Wacker's SLM series, and BASF's Paliocolor series.
  • RM materials see, for example, Reactive Mesogen Mixtures for Integrated Optical Films, Lee et al, 2003 IMID.
  • the RM material has a phase difference as in the case of a normal liquid crystal, and it hardens after being irradiated with ultraviolet rays, and becomes an optical layer having a certain phase difference after hardening. Therefore, after the color shift compensation film of the RM material is added in a certain manner in the liquid crystal display, the phase difference of the liquid crystal can be reduced, thereby improving the color generated when the screen of the liquid crystal display in the fringe field switching mode is viewed from the left and right sides. Partial problem.
  • liquid crystal display in the fringe field switching mode provided by the embodiment of the present invention
  • the liquid crystal display 100 is, for example, a fringe field switch (FFS) type liquid crystal display. As shown in FIG. 2A, the liquid crystal display 100 includes: a color filter substrate 10, an array substrate 20, and a liquid crystal layer 30 between the color filter substrate and the array substrate. An upper surface alignment layer 40 is disposed between the color filter substrate 10 and the liquid crystal layer 30, and a lower surface alignment layer 50 is disposed between the array substrate 20 and the liquid crystal layer 30.
  • FFS fringe field switch
  • the liquid crystal display 100 is, for example, an advanced multi-dimensional electric field (ADS) type liquid crystal display, and further includes: a color filter substrate 10, an array substrate 20, and a liquid crystal layer 30 between the color filter substrate and the array substrate.
  • An upper surface alignment layer 40 is disposed between the color filter substrate 10 and the liquid crystal layer 30, and a lower surface alignment layer 50 is disposed between the array substrate 20 and the liquid crystal layer 30.
  • the upper and lower surface alignment layers are, for example, polyimide (PI) layers, and a fine groove of a certain orientation is formed on the surface thereof by a rubbing process for pre-orienting the liquid crystal.
  • 2B shows an enlarged schematic view of the upper surface alignment layer 40, the liquid crystal layer 30, and the lower surface alignment layer 50.
  • the upper surface alignment layer 40 sequentially includes, in the direction of the color filter substrate 10 to the liquid crystal layer 30, a first upper surface alignment layer 41, a color shift compensation film layer 42, and a second upper surface alignment layer 43.
  • the color shift compensation film layer 42 is prepared from a hardened RM material.
  • the RM material has the usual liquid crystal properties and has a certain phase difference after hardening.
  • the rubbing direction of the first upper surface alignment layer 41 is set to be the same as the rubbing direction of the lower surface alignment layer 50.
  • the rubbing direction of the first upper surface alignment layer 41 is used to orient the RM material.
  • the rubbing direction of the color shift compensation film layer 42 is set to be the same as the rubbing direction of the lower surface alignment layer 50.
  • the rubbing direction of the second upper surface alignment layer 42 is set to be opposite to the rubbing direction of the lower surface alignment layer 50.
  • the liquid crystal display having the above structure has a phase difference generated for the right side which is slightly equal to the phase difference generated for the left side, that is, the phase difference generated for the left and right sides in the liquid crystal display of the prior art is eliminated, thereby resulting in generation.
  • An example of the forming process of the first upper surface alignment layer is as follows. First, in the color film A first upper surface alignment layer 41 is formed on the inner surface of the substrate 10, and the first upper surface alignment layer 41 on the color filter substrate 10 is subjected to alignment treatment along the same rubbing direction as the lower surface alignment layer 50 on the array substrate 20. Rubbing in the same direction. At this time, as shown in FIG. 2B, the rubbing direction of the lower surface alignment layer 50 is leftward, and the rubbing direction of the horizontal first upper surface alignment layer 41 is also leftward.
  • a color shift compensation film layer 42 is formed on the first upper surface alignment layer 41, that is, the RM material is coated, and then the color shift compensation film layer 42 is oriented in accordance with the orientation characteristics of the first upper surface alignment layer 41, that is, RM.
  • the rubbing direction of the color shift compensation film layer 42 is also the same as the rubbing direction of the lower surface alignment layer 50 on the array substrate 20, and then the RM color shift compensation film layer is cured by UV irradiation.
  • a second upper surface alignment layer 43 is formed on the color shift compensation film layer 42, and the second upper surface alignment layer 43 is subjected to an alignment treatment to rub in a direction opposite to the rubbing direction of the lower surface alignment layer 50 on the array substrate, that is, The rubbing process is performed to the right to form an anti-parallel rubbing structure in the initial stage of formation of the liquid crystal display in the fringe field switching mode.
  • the arrangement direction of the RM material is opposite to the pre-arrangement direction of the liquid crystal.
  • the arrangement direction of the RM material is opposite to the pre-arrangement direction of the liquid crystals and is symmetrical to each other.
  • the color shift compensation film layer 42 of the RM material is rubbed in the opposite direction to the lower surface alignment layer 50 on the array substrate 20, a larger phase difference is generated in the liquid crystal display as a whole, and thus the rubbing direction thereof It must be the same as the rubbing direction of the lower surface alignment layer 50 on the array substrate 20.
  • the orientation direction of the color shift compensation film layer 42 of the RM material is opposite to that of the liquid crystal, so there is an effect of compensating the phases with each other; if the orientation direction of the color shift compensation film layer 42 of the RM material is opposite to the liquid crystal and is symmetrical with each other, the phase The compensation effect is better.
  • the phase difference generated by the liquid crystal display becomes small, and the viewing effect is yellowish or pale blue.
  • the first upper surface alignment layer 41 may also be formed of a UV polarizer, and the rubbing process for the first upper surface alignment layer 41 will also be eliminated.
  • the embodiment of the present invention has the following characteristics:
  • the effect of compensating the phase between the color shift compensation film layer and the liquid crystal layer can be achieved.
  • the phase difference generated by the screen of the liquid crystal display on the left and right sides will become smaller, and the viewing effect may be improved to be yellowish or light blue, thereby effectively solving the fringe field switching mode viewed from the left and right sides.
  • the color shift problem that occurs when the LCD screen is used.
  • the method of adding a color shift compensation film to a polarizer has a problem that the thickness of the polarizer is increased; however, the thickness thereof is not changed in the embodiment of the present invention; therefore, the fringe field switching can be applied to a television, a display, or the like.
  • the design of the ultra-thin model of the model provides a powerful help.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)
  • Optical Filters (AREA)

Abstract

La présente invention porte sur un dispositif d'affichage à cristaux liquides (100) qui comprend un substrat de film de couleur (10), un substrat en réseau (20) et une couche de cristaux liquides (30) située entre le substrat de film de couleur et le substrat en réseau ; une couche d'orientation de surface supérieure (40) est disposée entre le substrat de film de couleur et la couche de cristaux liquides, et une couche d'orientation de surface inférieure (50) est disposée entre le substrat en réseau et la couche de cristaux liquides ; la couche d'orientation de surface supérieure est configurée pour comprendre successivement dans la direction depuis le substrat de film couleur vers la couche de cristaux liquides une première couche d'orientation de surface supérieure (41), une couche de film de compensation de prédominance chromatique (42) et une couche d'orientation de surface supérieure (43), l'orientation de la couche de film de compensation de prédominance chromatique étant opposée à la pré-orientation de la couche de cristaux liquides. Une couche de film de compensation de prédominance chromatique est utilisée pour améliorer des problèmes de prédominance chromatique produits lors de l'observation depuis des côtés gauche ou droit d'un écran de cristaux liquides dans un mode de commutation de champ de franges.
PCT/CN2012/081362 2011-10-20 2012-09-13 Dispositif d'affichage à cristaux liquides WO2013056607A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/698,473 US9146421B2 (en) 2011-10-20 2012-09-13 Liquid crystal display
JP2014536097A JP6037476B2 (ja) 2011-10-20 2012-09-13 液晶ディスプレイ
KR1020127030808A KR101566066B1 (ko) 2011-10-20 2012-09-13 액정 디스플레이
EP12778027.8A EP2605061A4 (fr) 2011-10-20 2012-09-13 Dispositif d'affichage à cristaux liquides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201120403039XU CN202256968U (zh) 2011-10-20 2011-10-20 液晶显示器
CN201120403039.X 2011-10-20

Publications (1)

Publication Number Publication Date
WO2013056607A1 true WO2013056607A1 (fr) 2013-04-25

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US (1) US9146421B2 (fr)
EP (1) EP2605061A4 (fr)
JP (1) JP6037476B2 (fr)
KR (1) KR101566066B1 (fr)
CN (1) CN202256968U (fr)
WO (1) WO2013056607A1 (fr)

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JP6037476B2 (ja) 2016-12-07
KR20130055614A (ko) 2013-05-28
JP2014531050A (ja) 2014-11-20
US9146421B2 (en) 2015-09-29
KR101566066B1 (ko) 2015-11-05
CN202256968U (zh) 2012-05-30
EP2605061A4 (fr) 2014-07-23
US20130194530A1 (en) 2013-08-01
EP2605061A1 (fr) 2013-06-19

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